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Finding the Fourth Proportional to 160.18, 221.08 and 93.78

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Solution

The fourth proportional to 160.18, 221.08 and 93.78 is: 129.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.18 : 221.08 = 93.78 : x
  2. Step 2: Convert to fraction form
    160.18/221.08 = 93.78/x
  3. Step 3: Cross multiply
    160.18x = 221.08 × 93.78
  4. Step 4: Simplify right side
    160.18x = 20,732.41
  5. Step 5: Solve for x
    x = 20,732.41/160.18
  6. Step 6: Final answer
    x = 129.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.